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What This Guide Helps With
Troubleshoots unresponsive user controls caused by temporary software state, contamination, physical obstruction, external accessories, power problems, or control failure.
Step-by-Step Troubleshooting
1. Protect the Patient and Transfer Monitoring
If the display or controls cannot reliably show patient information, alarms, or permit necessary operation, move the patient to another verified monitor before troubleshooting.
Expected outcome: Required fetal and maternal monitoring continues on reliable equipment.
2. Confirm Which Controls Are Affected
Determine whether the display is blank, frozen, partially updating, touch input is unavailable, specific hard keys fail, or all controls are unresponsive.
Expected outcome: The failure is narrowed to the display, touch interface, specific keys, or overall system response.
3. Check Power and Basic Status
Confirm the monitor has verified AC or battery power and observe whether indicators, sounds, or connected functions show that the device is still operating.
Expected outcome: A simple power-loss condition is either corrected or ruled out.
4. Inspect the Control Surfaces
Check the display, touchscreen area, buttons, and surrounding bezel for liquid, residue, tape, labels, cracks, impact damage, stuck keys, or objects applying continuous pressure.
Expected outcome: Control surfaces are clean, dry, unobstructed, and physically intact.
5. Disconnect Nonessential External Accessories
With the monitor off-patient, disconnect nonessential external accessories that could be contributing to abnormal operation, while maintaining only what is necessary for controlled testing.
Expected outcome: The monitor can be evaluated without an external accessory causing input or communication interference.
6. Perform a Controlled Restart
If clinically safe and the patient has already been moved to alternate monitoring, perform a normal controlled shutdown and restart using approved user-accessible controls.
Expected outcome: The monitor completes startup and controls respond normally. If the problem does not recur, continue through verification before return to service.
7. Test Each User Interface Function
Check representative touch areas and hard keys needed for normal operation. Look for intermittent response, repeated inputs, delayed operation, or controls that remain stuck.
Expected outcome: All required operator controls respond consistently and accurately.
8. Check Accessible Configuration
Verify that the apparent unresponsive condition is not due to an expected screen state, locked function, or approved configuration. Do not bypass security or use unauthorized service functions.
Expected outcome: Normal accessible configuration is confirmed.
9. Perform Complete Functional Verification
Verify display updates, alarm visibility and audio, touchscreen or keys, parameter display, menu navigation, and basic monitoring functions.
Expected outcome: The interface functions normally and consistently. If successful, troubleshooting can stop.
10. Remove From Service for Persistent Interface Failure
If the display freezes again, touch input remains unreliable, or required hard keys fail, remove the monitor from service.
Expected outcome: Equipment with unreliable operator controls is labeled Out of Service and referred for bench evaluation.
If the Problem Persists
External obstruction, contamination, power state, accessories, and a controlled restart have been evaluated. Remaining possibilities include the display assembly, touch interface, keypad hardware, internal communication, software, or another service-level fault.
Remove the monitor from service, label it Out of Service, and send it for repair or bench evaluation. Use appropriate Philips documentation and approved test equipment. Internal repair or software/configuration work should be completed only by qualified personnel.
Before return to service, verify all controls, display functions, alarms, startup, parameter presentation, and normal monitoring operation. Continuing to use unreliable controls is not appropriate troubleshooting.
Clinical Use Tip
An otherwise functioning monitor should still be exchanged if clinicians cannot reliably view alarms or operate required controls.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Staff reported that several hard keys on the Avalon FM20 stopped responding during setup."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found dried residue around the affected external keys that prevented normal movement."
Resolution
What action was taken.
Example:
"Cleaned the accessible control surface according to approved procedures and verified consistent key response, display operation, alarms, and normal monitoring functions."
Helpful Details to Include (If Known)
- Display versus touchscreen versus hard-key symptoms
- Whether the screen was frozen or updating
- AC or battery status
- Visible contamination or damage
- Accessories disconnected
- Restart result
- Specific controls tested
- Alarm display and audio results
- Final device status
Final Thought
Treat an unreliable interface as a patient-safety concern, rule out simple external causes first, verify every required control afterward, and escalate recurrent failures appropriately.
That is successful troubleshooting.